Means for retaining the wrist-pins of pistons.



P. G. RHOADS & H. A. LBIS. MEANS FOR RETAINING THE WRIST PINS QBRISTONS,

APPLICATION rim-5161i 5. 191a Patented Mar. 4, 1913. I

To allwhamz'tmay-concem: v

Be it known that we, Fos'rnn G.-Ri ioaos,

UNITED sT 'rEs rn runtr OFFICE.

ros'rEa o. nnoans AND mien A. Lars; or DAYTON, OHIO.

missus FOR RETAINING THE wms'r-rm's or rxsrons.

' p Application flledIu and HUGH A. Line citizensjo f the United States,residing at bayton, in ,t egounty of.

Mont omery and State 'of Oh 0, have invente certain new and=""useful.rov'e ments in Means for Retaining-the rist Pins of Pistons and we dodeclarethe following to be a fu1l,-'cl ear, andexact description of theinvention, such as will enable others'skilled in the art to-which itapper;

' tains to make and use the same, reference being had to theaccompanying drawings,

and to the, letters and figures of reference marked thereon, which forma part of this specification.

This inventioncomprises retaining means .for the wrist pins of pistonsof themternal combustion engine type.

Otherwise expressed, the invention relates to means'for retaining inposition the wrist pin which connects the piston rod.

The object of the invention is topro vide and piston 'means of asimplified character which will securely maintain the wrist pin inposition and yet may easily be removed when necessary to detach thepiston and rod,--and with out requiringthe-aid of specialtools.

-Referring to the drawings, Figure' 1 is a longitudinal sectional viewthrough a piston of an internal combustion engine showing the inventionapplied thereto; Fig. 2 -is a similar view showin a modification; Fig; 3

is a section on the line'a -a of Fig. 1'; and

Fi ,4 isa section on'the line 6-]; of 2. n the specification anddraw1ngs,sim1lar reference characters indicate corresponding parts-Referring in detail to the drawings, 1 represents a piston of aninternal combustion.

T engine, the same being provided with inter? I nal apertured bosses 2for the reception of.

a wrist pin. 3 which also asses through one end of a piston rod 4 andconnects the two. Near one end of said pin 3, it is provided with aperipheral ball cavity 10, or. cone cavity 8. In one of the bosses 2 onthe interior of the piston, is a pocket 5 which re- Specification ofLetters Patent.

n," 5,- 1e12. Serial No. 701,808.

ceivesa sprin' 6'which controls a ball 7, as is shown 1n the pressureoffered by the sprin 6. The pressure is sufficient to hold the- -ball' 7in said. cavity with sufiicient resistance to prevent the pin 3 movinglen thwi'se. The reinoved laterally under a force. applied for thepurpose. F

In Figs. 2 and 4, a modified form is illus trated, in which a button 9is substituted for the ball 8. The button 9 is rovided with a conicalface which is received by similar formed cavity 10 in .the pin. Theaction of pin 3, is identical with that of the bal spring 6 is acontinuation of the aperture 11 wrist pin may be remove without 'latingsaid locking member.

" In testimony w ereof we afliiour signs tures, in prese pce of twowith. g i IFQSTER c mioansr i nesses I MATTHEW SIIQBLEB the button 9, inholding and releasin the Patented Mar. 4,19 1,3.

igs. 1 and 3.- When thepinl. 4 IS in a normal position, the ball 7 seatsin? the shallow cavity 8 and is held therein by 'sistance offered by theba 17 is not, however, suflicient to prevent the pin 3 being The pocket5 for the reception of the I 1 0 which lies on one side of the pin.Through said aperture 11, the spring and ball or but-' ton may be easilyplaced 1npositionbeforev in said pocket engaging said loc ing memv herand maintaining it in enga ement' with v the cavityin the wrist in wereby said'

